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Re: find the maxima in a function


f[x_] := 1/(8*(Pi*t)^(3/2))*Exp[(-(x^2 + y^2 + z^2)/4*t)]

Reduce[f'[x] == 0, x]

t!=0\[And]x\[LongEqual]0

Off[Solve::ifun]

Solve[f'[x] == 0, x]

{{x->0}}


Bob Hanlon

---- Oliver <sch_oliver2000 at yahoo.de> wrote: 

=============
Hallo,
how can one find the maxima by using mathematica for the following function:

f[x_] := 1/(8*(Pi*t)^(3/2)) * Exp[(-(x^2 + y^2 + z^2)/4*t)]

i mean, the first derivation equal Zero.
Thanks in advance..
Oli.



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